Compressed Gas Levitation Device

ABSTRACT

A levitation device includes a body having a top surface and a bottom surface positioned opposite the top surface, an air reservoir configured to contain a predetermined volume of compressed air, and a thrust arrangement including a flow conduit having a primary inlet, a secondary inlet, and an outlet, with the outlet positioned adjacent to the bottom surface of the body. The secondary inlet is in fluid communication with ambient air and the primary inlet is in fluid communication with the air reservoir and positioned upstream from the secondary inlet and the outlet.

CROSS-REFERENCE TO RELATED APPLICATION

This application claims priority to U.S. Provisional Application Ser.No. 62/288,093, filed Jan. 28, 2016, which is hereby incorporated byreference in its entirety.

BACKGROUND OF THE INVENTION

Field of the Disclosure

The present disclosure relates to a levitation device and method and,more particularly, to a compressed gas levitation device and method.

Description of the Related Art

Levitation devices are desirable for use in recreational activities,travel, and lifting, as well as a multitude of other uses, forindividual consumers, industrial applications, and government functions.Current compressed gas levitation technologies require significantamounts of positive pressure gas in order to produce levitation. Anincrease in compressed gas required for levitation directly results inan increase in power requirements for compressed air generation, orsignificant storage volumes of compressed gas. Current compressed gasgeneration technologies are not feasible for incorporation into acompressed gas levitation device due to size, weight, power requirement,flow and pressure generation, and cost. Large storage volumes are notfeasible for a compressed gas levitation device due to size and weightof the pressurized volume required for sustainable levitation. Sometechnologies have proposed a skirt design to capture and retain thecompressed gas in an enclosure to minimize the amount of compressed gasrequired to sustain levitation; however, these existing technologieshave proven inadequate for sustainable compressed air levitation, aswell. Therefore, it would be desirable to reduce the amount ofcompressed gas required for levitation, in turn reducing powerrequirements for compressed air generation and storage volumes forcompressed gas levitation devices.

SUMMARY OF THE INVENTION

In one embodiment, a levitation device includes a body having a topsurface and a bottom surface positioned opposite the top surface, an airreservoir configured to contain a predetermined volume of compressedair, and a thrust arrangement comprising a flow conduit having a primaryinlet, a secondary inlet, and an outlet, with the outlet positionedadjacent to the bottom surface of the body. The secondary inlet is influid communication with ambient air and the primary inlet is in fluidcommunication with the air reservoir and positioned upstream from thesecondary inlet and the outlet.

The thrust arrangement may be configured to provide a thrust force atthe outlet. The primary inlet may be positioned 90 degrees relative tothe second inlet. The flow conduit may include a constricted section,with the thrust arrangement configured to provide a Venturi effect withentrainment of ambient air via the secondary inlet to supplementcompressed air provided from the primary inlet and the air reservoir.The constricted section may be a section of the flow conduit where adiameter of the flow conduit decreases from a first diameter to a seconddiameter and subsequently increases back to the first diameter. Theconstricted section may be a smooth tapering in diameter from the firstdiameter to the second diameter and back to the first diameter. Thethrust arrangement may include at least a first pair of flow conduitsand a second pair of flow conduits. The secondary inlets and outlets ofeach flow conduit may be located 180 degrees from each other in az-dimension extending perpendicular from an x-y plane defined by the topsurface of the body. The secondary inlets may be spaced from the outletsof each conduit in a y-dimension extending from a first end of the bodyto a second end of the body.

One of the secondary inlets of the first pair of flow conduits may bepositioned above one of the outlets of the first pair of flow conduitsin the z-dimension. Each of the flow conduits of the first pair of flowconduits may include a constricted section, with the constricted sectionof one of the flow conduits of the first pair of flow conduits spacedfrom the other constricted section of the other one of the flow conduitsof the first pair of flow conduits in an x-dimension extendingperpendicular to a y-dimension extending from a first end of the body toa second end of the body. The body may include a first end and a secondend positioned opposite the first end along a longitudinal axis of thebody, with the primary inlet and the secondary inlet positioned at aboutthe first end of the body and the outlet is positioned at about thesecond end of the body. The air reservoir may be defined by a spacewithin the body, with the thrust arrangement received within the body.The air reservoir may be defined by an air cylinder received within thebody, with the thrust arrangement received within the body. The body maydefine an opening configured to receive the air reservoir. An airreservoir supply line may connect the air reservoir to the primary inletof the flow conduit. The primary inlet may include a nozzle having anorifice.

In a further embodiment, a method for levitation includes: providing asource gas within an air reservoir; flowing the source gas through anorifice to produce a Venturi effect as the source gas exits an outlet;entraining a secondary gas comprising ambient air; creating a pressuredecrease at a secondary inlet of the secondary gas; mixing the sourcegas and the secondary gas to form a tertiary gas mixture, with thetertiary gas mixture including the source gas and the secondary gas, andwith the source gas and the secondary gas being mixed in a flow conduithaving a constricted section of decreasing diameter and increasingdiameter; flowing the tertiary gas mixture through an outlet; creating apressure increase at the outlet; and inducing levitation throughcreation of a pressure decrease at the secondary inlet of the secondarygas and a pressure increase at the outlet of the tertiary gas mixture.

The source gas may have a moisture dew point of −20 degrees Fahrenheit,or lower, as measured at 14.7 psia and 72 degrees Fahrenheit, andpressurized to a minimum of 5 psig. The secondary inlet may be located180 degrees from the outlet in a z-dimension.

BRIEF DESCRIPTION OF THE DRAWINGS

The above-mentioned and other features and advantages of thisdisclosure, and the manner of attaining them, will become more apparentand the disclosure itself will be better understood by reference to thefollowing descriptions of embodiments of the disclosure taken inconjunction with the accompanying drawings, wherein:

FIG. 1A is a top view of a levitation device in accordance with anembodiment of the present invention.

FIG. 1B is an enlarged view of the levitation device shown in FIG. 1A.

FIG. 2A is a front view of the levitation device of FIG. 1A.

FIG. 2B is an enlarged view of the levitation device shown in FIG. 2A.

FIG. 3 is a bottom view of the levitation device of FIG. 1A.

FIG. 4 is a left side view of the levitation device of FIG. 1A.

FIG. 5 is a right side view of the levitation device of FIG. 1A.

FIG. 6 is a top view of a body of a levitation device in accordance withan embodiment of the present invention.

FIG. 7 is a sectional view along line 7-7 shown in FIG. 6.

FIG. 8 is a bottom view of the body of FIG. 6.

FIG. 9 is a top view of a thrust arrangement of a levitation device inaccordance with an embodiment of the present invention.

FIG. 10A is a front view of the thrust arrangement of FIG. 9.

FIG. 10B is an enlarged view of the thrust arrangement shown in FIG.10A.

FIG. 11 is an enlarged view of the area indicated in FIG. 9.

FIG. 12 is a top view of a portion of a flow conduit of a thrustarrangement for a levitation device in accordance with an embodiment ofthe present invention.

FIG. 13 is a front view of the flow conduit of FIG. 12.

FIG. 14 is a front view of a handlebar arrangement for a levitationdevice in accordance with an embodiment of the present invention.

FIG. 15 is a schematic flow diagram of a flow conduit of a thrustarrangement for a levitation device in accordance with an embodiment ofthe present invention.

FIG. 16 is a top view of a levitation device in accordance with afurther embodiment of the present invention.

FIG. 17 is a front view of the levitation device of FIG. 16.

FIG. 18 is a bottom view of the levitation device of FIG. 16.

FIG. 19 is a side view of the levitation device of FIG. 16.

Corresponding reference characters indicate corresponding partsthroughout the several views. The exemplifications set out hereinillustrate exemplary embodiments of the disclosure, and suchexemplifications are not to be construed as limiting the scope of thedisclosure in any manner.

DETAILED DESCRIPTION

The following description is provided to enable those skilled in the artto make and use the described embodiments contemplated for carrying outthe invention. Various modifications, equivalents, variations, andalternatives, however, will remain readily apparent to those skilled inthe art. Any and all such modifications, variations, equivalents, andalternatives are intended to fall within the spirit and scope of thepresent invention.

For purposes of the description hereinafter, the terms “upper”, “lower”,“right”, “left”, “vertical”, “horizontal”, “top”, “bottom”, “lateral”,“longitudinal”, and derivatives thereof shall relate to the invention asit is oriented in the drawing figures. However, it is to be understoodthat the invention may assume various alternative variations, exceptwhere expressly specified to the contrary. It is also to be understoodthat the specific devices illustrated in the attached drawings, anddescribed in the following specification, are simply exemplaryembodiments of the invention. Hence, specific dimensions and otherphysical characteristics related to the embodiments disclosed herein arenot to be considered as limiting.

Referring to FIGS. 1A-15, a levitation device 10 according to oneembodiment of the present invention is shown. As provided in more detailbelow, the levitation device 10 provides levitation with a minimizedsource gas amount to provide a sustainable levitation device forindividual consumers, industry, and government. The source gas used maybe from existing compressed air generation technologies, although thelevitation device may use gas from one or more of a variety of sourcesnot limited to existing compressed air generation or storagetechnologies. The levitation device 10 includes a body 12, an airreservoir 14, and a thrust arrangement 16, which are described in detailbelow.

Referring to FIGS. 1A-8, the body 12 of the levitation device 10includes a top surface 20, a bottom surface 22 positioned opposite thetop surface 20, a first end 24, and a second end 26 positioned oppositethe first end 24 along a longitudinal axis of the body 12. The body. 12may be generally planar with the first and second ends 24, 26 of thebody 12 having a rounded shape. The body 12 defines an internal space 28that receives the air reservoir 14 and the thrust arrangement 16. Inparticular, the air reservoir 14 may be defined by the body 12 such thatthe body 12 forms a tank configured to contain and store a source gas,such as compressed air. The body 12 may be constructed from lightweight,high strength materials. In one embodiment, the body 12 is analuminum-lined carbon fiber construction.

Referring again to FIGS. 1A-8, as noted above, the air reservoir 14 ispositioned within the body 12 and, in one embodiment, is defined by theinternal space 28 within the body 12. The air reservoir 14, however, maybe a separate reservoir from the body 12 and may be a commerciallyavailable tank that is received within the body 12 or positionedexternally from the body 12. The air reservoir 14 is configured tocontain and store a predetermined volume of source gas, such ascompressed air. In one embodiment, the source gas is stored in the airreservoir 14 at ambient temperature and positive pressure. Thetemperature of the source gas may be greater than 0 degrees Fahrenheit(F) and less than 200 F and in one non-limiting embodiment is 77 F,although other suitable temperatures may be utilized. The pressure ofthe source gas may be greater than 5 pounds per square inch gauge (psig)and less than 25,000 psig. In one non-limiting embodiment, the pressureof the source gas is 4,500 psig, although other suitable pressures maybe utilized. The source gas may be relatively free of water, having adew point of no greater than 0 F. In one non-limiting embodiment, thedew point of the source gas is −20 F or less, although other suitabledew points may be utilized. As shown more clearly in FIG. 1A, thepressure within the air reservoir 14 is measured and displayed via apressure measurement arrangement 30, such as a pressure gauge and/orpressure transmitter. The air reservoir 14 may have a 7500 psig maximumdesign pressure and 4500 psig standard operating pressure, althoughother suitable pressures may be utilized.

Referring to FIGS. 1A-3, 9-13, and 15, the thrust arrangement 16includes three pairs of flow conduits 40 that are configured to providea thrust force for levitation of the levitation device 10. Each of theflow conduits 40 has a primary inlet 42, a secondary inlet 44, and anoutlet 46. The secondary inlets 44 are positioned adjacent to the topsurface 20 of the body 12 and the outlets 46 are positioned adjacent tothe bottom surface 22 of the body 12. The secondary inlets 44 are eachin fluid communication with ambient air and the primary inlets 42 areeach in fluid communication with the air reservoir 14 via an airreservoir supply line 48. The primary inlets 42 each include a nozzle 52defining an orifice 54. In particular, as shown in FIGS. 13 and 15, thenozzle 52 extends into the flow conduit 40 with the orifice 54positioned downstream from the secondary inlet 44. The flow conduits 40and air reservoir supply line'48 may be pipes constructed fromlightweight, high strength material, although other suitableconfigurations and materials for the flow conduits 40 may be provided.For example, the flow conduits 40 may be formed integrally with the body12 of the levitation device 10. Each of the flow conduits 40 include aconstricted section 56 where the flow conduit 40 narrows in diameter orsize and subsequently increases in diameter or size. The constrictedsection 56 is a smooth tapering of the flow conduit 40, although othersuitable arrangements may be utilized. The thrust arrangement 16 isconfigured to provide a Venturi effect with entrainment of ambient airvia the secondary inlet 44 to supplement the source gas, such ascompressed air, provided from the primary inlet 42 and air reservoir 14.In particular, the nozzle 52 and orifice 54 produce a Venturi effect tocause entrainment of ambient air via the secondary inlet 44 with theconstricted section 56 of the flow conduit 40 causing the source gas andthe secondary gas to mix and form a tertiary gas mixture as discussed inmore detail below.

The production of the Venturi effect per the Bernoulli Principle isgoverned by the following equation:

$\begin{matrix}{{\frac{\rho \; v_{1}^{2}}{2} + p_{1}} = {{\frac{\rho \; v_{2}^{2}}{2} + p_{2}} = {Constant}}} & \left\lbrack {{Equation}\mspace{14mu} 1} \right\rbrack \\\begin{matrix}{p = {pressure}} \\{v = {velocity}} \\{\rho = {density}}\end{matrix} & \;\end{matrix}$

Air flowing through the nozzles 52 in each of the flow conduits 40 willbe controlled by a valve 60, or valves, located downstream from the airreservoir 14 and upstream from the outlets 46. The valve 60 will be usedto modulate the, flow through the orifices 54. The valve 60 may have a7500 psig design pressure and 4500 psig standard operating pressure,although other suitable designs may be utilized. The valve 60 may be oneof several designs, such as ball, gate, globe, etc. In one non-limitingembodiment, the valve 60 is a full port ball valve.

Since:

Q=v₁A₁=v₂A₂   [Equation 2]

-   -   Q=flow    -   A=area

Flow can be determined by the following equation:

$\begin{matrix}{Q = {{A_{1}\sqrt{\frac{2}{\rho} \star \frac{\left( {p_{1} - p_{2}} \right)}{\left( \frac{A_{1}}{A_{2}} \right)^{2} - 1}}} = {A_{2}\sqrt{\frac{2}{\rho} \star \frac{\left( {p_{1} - p_{2}} \right)}{1 - \left( \frac{A_{2}}{A_{1}} \right)^{2}}}}}} & \left\lbrack {{Equation}\mspace{14mu} 3} \right\rbrack\end{matrix}$

According to one embodiment, and utilizing the previously describedequations, each nozzle 52 may be sized with a discharge orifice 54 of0.150 millimeter (mm), or 0.00059 inches (in), in order to produce aminimal source air flow rate from the air reservoir 14 of 0.00374 actualcubic feet per minute (acfm), or 1.00 standard cubic foot per minute(scfm), or 4.58 pounds per hour (lb/hr), while providing sufficientforce for sustainable levitation as described herein. Based on theorifice area of 0.0177 mm², or 0.0000274 in², the resulting velocity ofthe source air from the air reservoir 14 will be 328 feet per second(ft/s).

All associated energy values can be determined given the velocity andBernoulli's equation for compressible flow thermodynamics:

$\begin{matrix}{{\frac{v^{2}}{2} + \Psi + \omega} = \omega_{o}} & \left\lbrack {{Equation}\mspace{14mu} 4} \right\rbrack \\{{\Psi = {\; z}},{{or}\mspace{14mu} {gravitational}\mspace{14mu} {potential}\mspace{14mu} {for}\mspace{14mu} \left( {E{arth}} \right)^{\prime}s\mspace{14mu} {gravity}}} & \; \\\left( {{negligible}\mspace{14mu} {in}\mspace{14mu} {this}\mspace{14mu} {case}} \right) & \; \\{{\frac{v^{2}}{2} + \omega} = \omega_{o}} & \; \\{{\omega = {\in {+ \frac{p}{\rho}}}}} & \; \\{\in {= {{specific}\mspace{20mu} {internal}\mspace{20mu} {energy}}}} & \; \\{\omega = {enthalpy}} & \; \\{\omega_{0} = {{total}\mspace{14mu} {enthalpy}}} & \;\end{matrix}$

Due to the decrease in fluid pressure, or stored energy, as air flowsthrough the nozzle orifices 54, kinetic energy increases in the form ofincreased velocity. As given by the equation below, some energy is lostin the form of heat energy as the gas expands to a new lower pressureafter passing through the orifice 54. Bernoulli's equation simplifiedfor energy loss through a reducing orifice is provided as follows:

$\begin{matrix}\begin{matrix}{{dE} = \frac{\left( {p_{1} - p_{2}} \right)}{\rho}} \\{{dE} = {{energy}\mspace{14mu} {loss}}}\end{matrix} & \left\lbrack {{Equation}\mspace{14mu} 5} \right\rbrack\end{matrix}$

The higher velocity of the air exiting the orifice 54 and entering theflow conduit 40 through the primary inlet 42 entrains a secondary gasstream (ambient) from the secondary inlet 44 for mixing with the sourceair from the primary inlet 42 and air reservoir 14 within the flowconduit 40. According to one embodiment, entrainment of the secondarygas is accomplished by positioning the primary inlet 42 and nozzleorifice 54 about 90 degrees from the secondary inlet 44 and positionedupstream of the constricted section 56 of the flow conduit 40 as shownin FIGS. 13 and 15. The secondary gas stream will be ambient air atambient temperature and atmospheric pressure, or 14.7 pounds per squareinch absolute (psia). Through entrainment of the secondary air, avacuum, or negative pressure, will be created at the secondary inlet 44.Entrainment of the secondary air stream will result in 9.5 psia, or −5.2psig, vacuum at the secondary inlet 44. As noted above, and shown inFIGS. 9 and 10, the thrust arrangement 16 includes three pairs of flowconduits 40 with each pair of conduits 40 having the flow conduits 40being nested with each other such that the secondary inlet 44 of a firstflow conduit 64 is positioned vertically above the outlet 46 of a secondflow conduit 66. Similarly, the secondary inlet 44 of the second flowconduit 66 is positioned vertically above the outlet 46 of the firstflow conduit 64. As discussed above, the secondary inlets 44 arepositioned adjacent the top surface 20 of the body 12 and the outlets 46are positioned adjacent the bottom surface 22 of the body 12. Theconstricted sections 56 of the first and second flow conduits 64, 66 arespaced from each other in a direction extending transversely to alongitudinal axis of the levitation device 10.

Mixing of the primary and secondary air streams within the flow conduits40 of reducing diameter at the constricted sections 56 and subsequentincreasing diameter, as shown in FIGS. 9-13, will result in productionof a tertiary gas stream of a moderate pressure at the outlets 46. Theresulting pressure of the tertiary gas stream is determined bycalculation of the mass and energy balances provided previously.According to one embodiment, the tertiary stream will be discharged at apositive pressure of 4.0 psig at the outlet 46. The tertiary stream willbe discharged to the atmosphere. The tertiary stream will dischargethrough the outlet 46 located on the bottom surface 22 of the body 12,or at a point below the secondary inlet 44 and being separated from thesecondary inlet 44 by 180 degrees as shown, for example, in FIG. 10A.

By incorporating one or more nozzle(s) 52 and orifice(s) 54, secondaryinlets 44, and outlets 46 for the tertiary gas mixture, a desiredlifting force can be created for use in levitation. The resultant forceis calculated using the areas of both the secondary inlet 44 and theoutlet 46 in the following equation:

$\begin{matrix}{{P = \frac{F}{A}}{P = {pressure}}{F = {force}}{A = {area}}} & \left\lbrack {{Equation}\mspace{14mu} 6} \right\rbrack\end{matrix}$

According to one embodiment, the amount of force required for lifting is200 pounds (lb), and the amount of nozzles 52 and orifices 54, secondaryinlets 44, and outlets 46 required for generating 200 lb of force totalssix (6) each as shown in FIGS. 1-10. The time of levitation is dictateddirectly by the air reservoir 14 pressure requirement, the air reservoir14 gas usage, and the size of the air reservoir 14, which, given an airreservoir 14 gas pressure requirement of 85% of design pressure and thesource gas flow rate from the air reservoir 14 noted above, isapproximately 30 minutes (min).

According to a further embodiment, the amount of force required forlifting is 130 lb, and the amount of nozzles 52 and orifices 54,secondary inlets 44, and outlets 46 required for generating 130 lb offorce totals four (4) each. Given an air reservoir 14 pressurerequirement of 85% of design pressure and the source gas flow rate fromthe air reservoir 14 noted above, is approximately 45 min for thisembodiment.

According to yet another embodiment, the amount of force required forlifting is 65 lb, and the amount of nozzles 52 and orifices 54,secondary inlets 44, and outlets 46 for generating 65 lb of force totalstwo (2) each. Given an air reservoir 14 pressure requirement of 85% ofdesign pressure and the source gas flow rate from the air reservoir 14noted above, is approximately 90 min for this embodiment.

Referring to FIGS. 1A-13, assuming an orientation where the width of thedevice 10 is in the x-dimension (as shown in FIG. 1A), the length of thedevice 10 is in the y-dimension (as shown in FIGS. 1A and 2A), and thedepth of the device 10 is in the z-dimension (as shown in FIG. 2A), thestructural design of the levitation device 10 may include nozzles 52 andorifices 54, secondary inlets 44, and outlets 46 located spatially as toallow for each nozzle pair 52 to be oriented 180 degrees from oneanother in the y-dimension, while maintaining chiral symmetry in thesame z-plane and x-plane for self-balancing of one embodiment of theinvention. As noted previously, the secondary inlets 44 and outlets 46of each flow conduit 40 flow path will be located 180 degrees from oneanother in the z-dimension, while maintaining the same x-plane butseparated by some length of the device 10 in the y-direction, bothlocated equidistant from the ends 24, 26 of the body 12 in they-direction. Hence, one embodiment of the device 10 may include six (6)nozzles 52 and orifices 54, three (3) located on each side 24, 26 of thebody 12 in the y-direction, each one (1) located 180 degrees in they-dimension and facing an opposing one (1) of the opposite three (3)nozzles 52 and orifices 54, and each set of two (2) nozzles 52 andorifices 54 located in the same z-plane and x-plane with chiral symmetryalong these planes. Along the length, in the y-dimension, of each flowconduit 40, the flow conduit 40 for primary and secondary gas mixingwill begin to decrease in diameter at the constricted section 56 to aminimum diameter where the flow conduit 40 begins increasing in diameteras the flow conduit 40 spatially wraps below, in the z-dimension, theopposing constricted section 56 of the opposing flow conduit 40.

In one embodiment of the invention, geometrically, the secondary inlets44 and outlets 46 are of circular cross-sectional shape, but can be ofany geometric shape, such as square, rectangular, triangular, hexagonal,etc., as long as the flow conduit 40 decreases in diameter with asubsequent increase in diameter along the y-dimension prior to theoutlet 46. Also, in one embodiment of the invention, geometrically, thesecondary inlet 44 and outlet 46 are of circular cross-sectional shape,but can be of any geometric shape, such as square, rectangular,triangular, hexagonal, etc., as long as the cross-sectional surface areamaintained is appropriate for the generation of the force desired.

According to one embodiment, the body 12 of the levitation device 10itself defines the air reservoir 14. In other words, the air reservoir14 may be formed integrally with the body 12 of the levitation device10. Thus, the levitation device 10 can be filled directly via aquick-connect high pressure fitting 70, with the fitting 70 and device10 internals being rated for a maximum pressure of 7500 psig and housinga standard operating pressure of 4500 psig for function, although othersuitable arrangements may be utilized. As noted above, the body 12 maybe constructed from aluminum-lined carbon fiber materials ofconstruction and required quality assurance and quality control testingregulations for 4500 psig compressed air vessels. The only volumeswithin the device 10 not contributing to the source gas/compressed airstorage volume of the device 10 are a pressure gauge housing 30, thecontrol valve boxes 74 and the flow conduits 40.

According to one embodiment, the structural design of the device 10,having nozzles 52 located 180 degrees opposite one another in they-dimension but still located in the same z-plane and x-plane, providesfor effective noise cancelation, reducing the decibels produced duringoperation. Due to high velocities created within the levitation device10, as described previously, sound waves are created within each nozzleorifice 54, which propagate outward. Providing nozzles 52 located 180degrees opposite one another in the y-dimension but still located in thesame z-plane and x-plane, the resultant waves of the same amplitude andinverted phase combine to form a new wave of lower amplitude throughinterference. In addition, the aluminum lined carbon fiber material ofconstruction, in one embodiment, additionally decreases the decibelsproduced due to the combination of both materials and the amount oflayers required for 7500 psig pressure rating regulations.

According to one embodiment, the levitation device 10 is designedstructurally for stable levitation in the z-dimension and the user ofthe device 10 propels the device 10 in the x- and y-dimensions duringuse. In order to stop the device 10, the user simply presses down on thetail or first end 24 of the body 12 of the levitation device 10 tocreate a friction force with the ground opposite the direction of traveland effectively slowing the speed of travel. As shown in FIG. 14, thelevitation device 10 may also include a carbon fiber, removable,ergonomic handlebar 80 for improved control during use of the levitationdevice 10.

Referring to FIGS. 16-19, a levitation device 100 according to a furtherembodiment is shown. The levitation device 100 is similar to thelevitation device 10 described above and shown in FIGS. 1A-15. Thelevitation device 100, however, only includes two pairs of flow conduits40. Further, the levitation device 100 includes one or more airreservoir 114 received within the body 12 of the levitation device 100.The air reservoir(s) 114 is a separate air cylinder or tank receivedwithin the body 12 of the levitation device 100. The air reservoir(s)114 may be, for example, a 4500 psig air cylinder, although othersuitable air cylinders may be utilized. Although received within thebody 12, the air reservoir(s) 114 may be positioned externally from thebody 12 and mounted to the body 12 or worn by a user of the levitationdevice 100. The air reservoir(s) 114 is connected to the primary inlets42 of the flow conduits 40 via the air reservoir supply lines 48 in thesame manner as discussed above in connection with the levitation device10. The body 12 of the levitation device 100 may be fabricated in onepiece using a 3D printing process or any other suitable manufacturingprocess. The flow conduits 40, air reservoir supply lines 48, airreservoir(s) 114 may be added separately to the body 12. The body 12 ofthe levitation device 100 also includes openings 116 for receiving theair reservoir(s) 114, although other suitable arrangements may beutilized.

While this disclosure has been described as having exemplary designs,the present disclosure can be further modified within the spirit andscope of this disclosure. This application is therefore intended tocover any variations, uses, or adaptations of the disclosure using itsgeneral principles. Further, this application is intended to cover suchdepartures from the present disclosure as come within known or customarypractice in the art to which this disclosure pertains and which fallwithin the limits of the appended claims.

What is claimed is:
 1. A levitation device comprising: a body having atop surface and a bottom surface positioned opposite the top surface; anair reservoir configured to contain a predetermined volume of compressedair; and a thrust arrangement comprising a flow conduit having a primaryinlet, a secondary inlet, and an outlet, the outlet positioned adjacentto the bottom surface of the body, the secondary inlet is in fluidcommunication with ambient air, the primary inlet is in fluidcommunication with the air reservoir and positioned upstream from thesecondary inlet and the outlet.
 2. The levitation device of claim 1,wherein the thrust arrangement is configured to provide a thrust forceat the outlet.
 3. The levitation device of claim 1, wherein the primaryinlet is positioned 90 degrees relative to the second inlet.
 4. Thelevitation device of claim 1, wherein the flow conduit comprises aconstricted section, the thrust arrangement configured to provide aVenturi effect with entrainment of ambient air via the secondary inletto supplement compressed air provided from the primary inlet and the airreservoir.
 5. The levitation device of claim 4, wherein the constrictedsection comprises a section of the flow conduit where a diameter of theflow conduit decreases from a first diameter to a second diameter andsubsequently increases back to the first diameter.
 6. The levitationdevice of claim 5, wherein the constricted section is a smooth taperingin diameter from the first diameter to the second diameter and back tothe first diameter.
 7. The levitation device of claim 1, wherein thethrust arrangement comprises at least a first pair of flow conduits anda second pair of flow conduits.
 8. The levitation device of claim 7,wherein the secondary inlets and outlets of each flow conduit arelocated 180 degrees from each other in a z-dimension extendingperpendicular from an x-y plane defined by the top surface of the body.9. The levitation device of claim 8, wherein the secondary inlets arespaced from the outlets of each conduit in a y-dimension extending froma first end of the body to a second end of the body.
 10. The levitationdevice of claim 8, wherein one of the secondary inlets of the first pairof flow conduits is positioned above one of the outlets of the firstpair of flow conduits in the z-dimension.
 11. The levitation device ofclaim 8, wherein each of the flow conduits of the first pair of flowconduits comprises a constricted section, the constricted section of oneof the flow conduits of the first pair of flow conduits spaced from theother constricted section of the other one of the flow conduits of thefirst pair of flow conduits in an x-dimension extending perpendicular toa y-dimension extending from a first end of the body to a second end ofthe body.
 12. The levitation device of claim 1, wherein the body has afirst end and a second end positioned opposite the first end along alongitudinal axis of the body, and wherein the primary inlet and thesecondary inlet are positioned at about the first end of the body andthe outlet is positioned at about the second end of the body.
 13. Thelevitation device of claim 1, wherein the air reservoir is defined by aspace within the body, and wherein the thrust arrangement is receivedwithin the body.
 14. The levitation device of claim 1, wherein the airreservoir is defined by an air cylinder received within the body, andwherein the thrust arrangement is received within the body.
 15. Thelevitation device of claim 14, wherein the body defines an openingconfigured to receive the air reservoir.
 16. The levitation device ofclaim 14, wherein an air reservoir supply line connects the airreservoir to the primary inlet of the flow conduit.
 17. The levitationdevice of claim 1, wherein the primary inlet comprises a nozzle havingan orifice.
 18. A method for levitation comprising: providing a sourcegas within an air reservoir; flowing the source gas through an orificeto produce a Venturi effect as the source gas exits an outlet;entraining a secondary gas comprising ambient air; creating a pressuredecrease at a secondary inlet of the secondary gas; mixing the sourcegas and the secondary gas to form a tertiary gas mixture, the tertiarygas mixture comprising the source gas and the secondary gas, wherein thesource gas and the secondary gas are mixed in a flow conduit having aconstricted section of decreasing diameter and increasing diameter;flowing the tertiary gas mixture through an outlet; creating a pressureincrease at the outlet; and inducing levitation through creation of apressure decrease at the secondary inlet of the secondary gas and apressure increase at the outlet of the tertiary gas mixture.
 19. Themethod of claim 18, wherein the source gas comprises a moisture dewpoint of −20 degrees Fahrenheit, or lower, as measured at 14.7 psia and72 degrees Fahrenheit, and pressurized to a minimum of 5 psig.
 20. Themethod of claim 18, wherein the secondary inlet is located 180 degreesfrom the outlet in a z-dimension.